Vibratory screener

Abstract

The vibratory screener presented is of a design to convert rotary vibration directly to an unsupported portion of a wire mesh or perforated plate screening surface, while imparting no vibratory energy to the screen's main supporting framework.

What is claimed is: 
     
       1. A mechanical vibratory screen drive for attachment to a screen mounted in a stationary main framework comprising a unitary motor driven mechanical vibrator; means for producing power to said vibrator; a vibrator mounting rigidly connected with said vibrator; a rigid cross beam structural assembly rigidly connected therewith and extending laterally substantially equally in opposite horizontal directions therefrom; a vibrator driving stud rigidly connected with said structural assembly directly beneath said vibrator; an attachment bracket rigidly connected with said driving stud and extending vertically downward therefrom; there being means at the lower end of said bracket adapted for rigid attachment to said screen only and at one location immediately below said bracket; vibration isolating means adapted to isolate the vibrator from the main screen support framework consisting of a plurality of rubber mounts; bracket means at opposite ends of said structural assembly; said structural assembly including a vertical plate, said bracket means being adapted to be rigidly attached to said main framework; said rubber mounts being firmly connected at opposite horizontal ends between the vertical plate of said structural assembly and said bracket means and providing the sole connection therebetween; whereby with the described parts so assembled and with power provided to said vibrator, said vibrator will supply effective vibration to said screen with little vibrator energy supplied to said screen supporting framework, the force of said vibrator drive provides a sharp and positive screening motion with sufficient power to overcome heavy screen loads on fine mesh screens, and widely varying loads on said screen will have little effect on the amplitude of screen vibration since it is not a tuned vibration system.